Determining land rental rates on farmland is not as easy as determining the price of a bushel of corn or soybeans because there is no open market for rental rates. There are however several strategies that can be employed to determine land rental rates. There is a good outline of several strategies put together by Don Hofstrand and William Edwards fro Iowa that can be found at http://www.extension.iastate.edu/AgDM/wholefarm/html/c2-20.html. Another resource is the Fair Rent software program that was created by Center for Farm Financial Management at the University of Minnesota. Contact you local Extension office for more information on this software program.